# Relationship history for MSHA mine 1400606

Current hierarchy: **Gary  Servaes → Gary Servaes Enterprises → MIDLAND QUARRY**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Midland Quarry Company → MIDLAND QUARRY; 1950-01-01 to 2005-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Louis F  Servaes → MIDLAND QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis F  Servaes → Midland Quarry Company; 1950-01-01 to 2005-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Servaes → MIDLAND QUARRY; 2002-05-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gary Servaes Enterprises → MIDLAND QUARRY; 2005-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Servaes → Gary Servaes Enterprises; 2005-05-16 to current/open; source msha-controller-operator-history